What are the initial symptoms of engine cylinder scuffing?
2 Answers
Here are the initial symptoms of engine cylinder scuffing: 1. Normally, the vehicle's power significantly decreases, commonly referred to as lack of power. 2. Abnormal water temperature, where the vehicle shows high temperature shortly after starting or even boils over. 3. Increased exhaust gas, with blue smoke appearing from the rear exhaust. 4. Abnormal noises during engine operation, sounding rough and muffled, with unstable idle speed requiring more fuel to maintain idle operation. 5. The vehicle may experience misfiring or cylinder cut-off after prolonged idling or short periods of driving. Additional information: Here are preventive measures for engine cylinder scuffing: 1. For new engines and those after major repairs, ensure proper break-in by following the principle of gradually increasing speed and load under good lubrication conditions, strictly adhering to break-in procedures before full-load operation. 2. Correctly select the clearance between the piston skirt and cylinder liner, as well as the opening and edge clearance of piston rings, according to the manufacturer's specifications. Additionally, ensure proper piston alignment and maintain the dimensional accuracy of the cylinder liner during repairs. 3. Maintain normal coolant temperature between 70°C-95°C to prevent engine overheating. Preheating measures should be taken before starting in winter. 4. Operate the engine reasonably, avoiding overload, unnecessary throttle revving, and starting without sufficient coolant. 5. Strengthen the maintenance of the air filter to prevent dust from being sucked into the cylinders.
I remember when my car had issues last time, the initial sound of engine cylinder scoring was unbearable—it was like a metallic scraping and rattling noise, especially noticeable during cold starts. At that time, while driving, I felt the acceleration was particularly weak, couldn’t pick up speed, and fuel consumption inexplicably increased a lot. Upon inspection, the smoke from the exhaust pipe was thicker than usual, and the car’s vibration became increasingly stronger. After driving for a while, the engine temperature rose unusually fast. If not repaired in time, the entire cylinder block would definitely need replacement. Now, with regular maintenance and using good engine oil, such problems rarely occur. So, if you hear any abnormal sounds, get it checked at a shop immediately—don’t delay, or the repair costs could be huge.
